graph [

   directed 1

   node [

      id 1

   ]

   node [

      id 2

   ]

   node [

      id 3

   ]

   node [

      id 4

   ]

   node [

      id 5

   ]

   node [

      id 6

   ]

   node [

      id 7

   ]

   node [

      id 8

   ]

   node [

      id 9

   ]

   node [

      id 10

   ]

   node [

      id 11

   ]

   node [

      id 12

   ]

   edge [

      source 1

      target 2

   ]

   edge [

      source 1

      target 3

   ]

   edge [

      source 1

      target 4

   ]

   edge [

      source 2

      target 5

   ]

   edge [

      source 2

      target 6

   ]

   edge [

      source 3

      target 7

   ]

   edge [

      source 3

      target 8

   ]

   edge [

      source 7

      target 11

   ]

   edge [

      source 7

      target 12

   ]

   edge [

      source 4

      target 9

   ]

   edge [

      source 4

      target 10

   ]

]



